A Comparative Study of Fuel Cell Electric Vehicle Hybridization with Battery or Supercapacitor
Paper in proceedings, 2018

This paper deals with the conception and the
achievement of a hybrid power source using a fuel cell combined
with a battery or a supercapacitor. In which, the fuel cell supplies
the main power to the drive system; while the battery or the supercapacitor is used as an auxiliary power source. This gives the
benefit that the regenerative energy is stored in battery or supercapacitor during the deceleration and it is transferred back to the
drive system during the acceleration when compared to electric
vehicles solely powered by a fuel cell. Different energy storage
devices, such as fuel cell, battery, and supercapacitor are compared, and then several structures of fuel cell-based electric vehicles are analyzed in the paper. Following that a conventional
topology based on fuel cell and battery using a DC/DC converter
with the connection between the fuel cell and the inverter, and a
floating voltage topology powered by fuel cell and supercapacitor
without any DC/DC converters are chosen for the simulation
analysis. Simulation results show that power variations of the
fuel cell in floating voltage topology can be smoother, and its rated power is downsized, which can extend the fuel cell lifetime and
take full advantages of the fuel cell and the supercapacitor.



fuel cell

hybrid power source

floating voltage topology

conventional topology


Qian Xun

Chalmers, Electrical Engineering, Electric Power Engineering, Electrical Machines and Power Electronics

Yujing Liu

Chalmers, Electrical Engineering, Electric Power Engineering, Electrical Machines and Power Electronics

Elna Holmberg

Chalmers, Electrical Engineering, Systems and control, Automatic Control

2018 International Symposium on Power Electronics, Electrical Drives, Automation and Motion (SPEEDAM)
Italy, ,

Cost-effective drivetrains for fuel cell powered EVs

SHC, 2017-01-01 -- 2019-06-30.

Floating voltage fuel cell drive system

Swedish Energy Agency, 2018-01-01 -- 2018-08-31.

Driving Forces

Sustainable development

Areas of Advance


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